Dynamic Torque Control for Medium Wind-Up Apparatus
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Solution Overview
Problem
Medium wind-up apparatuses face challenges in reducing motor current consumption while preventing sagging, as high output torque leads to increased current flow, and existing solutions fail to efficiently manage torque to balance rotation speed and load effectively.
Innovation Solution
A medium wind-up apparatus with a motor, a control portion that adjusts the torque limit value based on detected rotation speed, reducing current consumption by limiting torque when rotation speed exceeds thresholds and increasing torque when necessary to prevent sagging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the output torque of the motor is set to be high to prevent sagging in the medium, then the medium tension is improved, but the current that flows through the motor increases
Solution Approach 1:
The patent applies dynamics by making the torque limit value adjustable and changeable during operation. The control portion dynamically modifies the torque limit value based on detected rotation speed, transitioning from a static high torque setting to a dynamic adjustment mechanism that optimizes both medium tension and current consumption throughout the winding process
Solution Approach 2:
The patent implements parameter changes by varying the torque limit value as a function of rotation speed. The control portion changes the torque limit value based on detected rotation speed, creating a variable torque profile that adapts to different operational phases, thereby reducing overall current consumption while maintaining adequate medium tension when needed
2Strength
If the roll load is increased to prevent delayed rotation of the roll body, then the medium tension is improved, but the motor current increases
Solution Approach 1:
The system dynamically adjusts the torque limit value based on real-time rotation speed detection, allowing the roll load to be optimized for each operational moment rather than maintaining a constantly high load, thus preventing delayed rotation while reducing unnecessary current consumption
Solution Approach 2:
The control portion uses feedback from the detection portion that monitors rotation speed to continuously adjust the torque limit value. This closed-loop feedback mechanism ensures adequate roll load to prevent delayed rotation and sagging while optimizing current consumption by reducing torque when high load is not needed
Data Source
AI summary
A medium wind-up apparatus includes a reel-out motor, which is a driving source that winds up a medium, a control portion that controls the reel-out motor on the basis of a torque limit value, which regulates an upper limit of an output torque of the reel-out motor, and a reel-out side detection portion that detects a rotation speed of the reel-out motor, in which the control portion changes the torque limit value on the basis of the detected rotation speed. In this case, it is preferable that the control portion increase the torque limit value in a case in which the detected rotation speed falls below a first threshold value, and that the control portion reduce the torque limit value in a case in which the detected rotation speed exceeds a second threshold value, which is larger than the first threshold value.